My guess is that you'll be getting that Force Link Type report from all the items that were tested for that position but *aren't* the right Type - so even if you look at clock positions that DID schedule fine, you'll actually see that it will have considered many links but rejected a whole load for them being the wrong type.

In Settings, turn on the option to keep a list of all items tried for every position, then in the Log Editor if you highlight an item and click the Tested button it will show you every item considered and the reasons that it was rejected - usually helps track down what is causing fails.