Ctrl-Shift-F showing deleted methods from old image, which Ctrl-. doesn't

Have noticed an interesting situation.

I type in a method (its quite a unique one eg: exactly:like:answer...)
and the code completion correctly shows me some methods that match this
pattern.

If I type cttrl-shift-f and enter the same thing in "exac" it shows me
methods like Ctrl-. however it also seems to be showing methods that
don't exist in the image? Or at least are old methods that I wrote
weeks ago in another image (although they might exist in Sts?).

Anyone else noticed this?

Tim

.