Still seething over the postponement of all five of their Northern Championship fixtures on Saturday, Riverside OIympic have highlighted an anomaly which they say puts their women's side at a major disadvantage.

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In the new-look seven-team Women's Super League, newcomers Launceston United have byes on the weekends of April 17, July 10 and August 7, and Devonport on April 10, June 5 and July 17. On all six occasions, the clubs' Northern Championship sides are rostered to play Riverside.

While starting players in the WSL are not allowed to play in the following week's NC match, all substitutes are, leaving Olympic claiming they are competing on an uneven playing field.

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"I cannot understand how this can happen," women's coach Jo Haezebrouck said.

"They could stack their team with Super League players. Is that a fair way of creating a league?

"Our players pay a registration fee of $300 each and we're just asking for a fair competition."

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The other end of the wedge occurred on Saturday when Devonport were unable to field teams in both competitions so forfeited their Northern Championship fixture against Launceston City.

"There are six other teams, how come every time we play United or Devonport they have a Super League bye?" Haezebrouck added.

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"It's completely unfair. We are the victim through the whole season.

"We have sent an email complaining about this and it has to be addressed. We play Devonport in round three and would like to have it resolved by then."

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Football Tasmania said coordinating the eight-team NPL and Northern Championship with the seven-team WSL meant one team is always matched with the bye and insisted there is no competitive disadvantage.

FT chief executive Matt Bulkeley said all feedback, including Riverside's, had been factored in to the final rosters.

"We're aware of the concerns raised by the club and there's been some changes made to the 2021 competition regulations to minimise issues and we are communicating this to all clubs," he said.

The 2021 competition regulations on FT's website states: "No player starting in the NPL or WSL can play in any other Championship match in the same round. In the event of a bye, please refer to previous match.

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"All named substitutes in the NPL and WSL may play in their Championship."

Olympic president Stuart McCarron said the club had written to Football Tasmania.

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"I would not go as far as to say it was a conspiracy but it does seem very unfair," he said.

"The rostering is disastrous. We're still waiting for times and rosters for every league.

"I'm trying to arrange a sponsors' and life members' day but cannot tell them what time the game is and ultimately that is going to cost us money. It makes me look unprofessional because we cannot arrange anything. In the financial times we are in, we need to be acting more professionally."

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Riverside had all their opening-round Championship fixtures postponed because the roster did not accommodate Ulverstone's lack of ground availability.

Northern Rangers' request for away fixtures due to cricket commitments at the NTCA Ground was also overlooked, meaning the club have hired Windsor Park for all their matches this Saturday.

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Adding to the saga has been the lack of available changerooms at Prospect Park where Launceston City's first round of matches clashed with a gala footy day prompting the club to hire several shipping containers for players to get changed in.