On 5 April 2008, Seip refused to be a substitute in a league fixture against Charlton Athletic, after having made four successive starts. He was subsequently fined two weeks wages, and placed on the transfer list, by manager Paul Sturrock. On 4 July, Seip apologised to Sturrock and his teammates over the Charlton affair. As a result, the club removed him from the transfer list. In the 2008–09 season Seip was once again a regular in the first-team and in November 2008, renewed his contract with "Argyle", tying him to the club until the summer of 2011. He made a total of 42 appearances that season, scoring three goals. After a 1–3 defeat at home to Sheffield Wednesday on 29 August 2009, Seip was again placed on the transfer list after a "breach of discipline", reported to have been a "dressing room bust up with manager Paul Sturrock". On 28 September it was reported that Seip was set to join fellow Championship side Blackpool on a one-month loan deal, where he would join up with his former manager Ian Holloway. The following day it was confirmed that Seip had signed for "the Seasiders" the previous evening, on loan until 31 October. Later that day he was an unused substitute in Blackpool's 2–0 defeat to Bristol City at Ashton Gate Stadium. His first appearance was for the reserve team in their 4–3 Central League Division One West win over Preston North End on 14 October. After receiving clearance to play, three days later he made his first team debut, and scored the opening goal in a 2–0 win over his parent club, Plymouth Argyle, at Bloomfield Road. After the game Seip said of both his goal and Paul Sturrock, ""I'm delighted to have scored. I was training on my own at Plymouth. I'll never play for that man again, and he'll never pick me. Yes, we have had a big fallout but Blackpool have given me a chance and I want to take it""  However, the goal and the fact that Plymouth allowed Seip to play in the game created controversy with "Argyle" club captain Carl Fletcher later saying, ""Marcel playing for Blackpool should never have happened. It made the whole club look like a Mickey Mouse club, and players take that to heart. At the end of the season, if we get relegated by one goal, that's going to affect the livelihoods of 30-odd players here and people working at the club.""