Interesting that a lot of these seem to be on random frequencies. Ireland's Wireless Public Address System (WPAS) service offers two sets of frequencies and the option of AM or FM modulation. While the logs on 27.xx0 and 27.xx5 make sense, there's signals on 27.637 and 27.688 and whatnot.
The WPAS system allows operation on 10kHz spaced channels from 27.605 to 27.995 (no gaps, AM or FM allowed) and 27.60125 to 27.99125 (no gaps, AM or FM allowed). The 27.60125-27.99125 allocation is the same as the UK 40 channel FM CB "27/81" allocation and would explain the signals on 27631, 27650, 27680, 27742, 27810 and 27890 kHz. Have all of these been FM that you've logged? Maybe these churches are really just picking a frequency between 26 and 28 MHz and going with it. The 27506 kHz one isn't even a legal frequency for WPAS or CADS
(and yes I know this is an old thread I just thought I'd share the information about the WPAS (and whatever the UK version is - Community Audio Distribution System / CADS - which appears to only operate in the 27.60125 - 27.99125 allocation with FM mode only, legally speaking anyway).