There are a couple of things to do:DarkAudit said:
1) Turn on the setting to hide SD Duplicates (System Setup > Display). This will prevent any auto-recordings from being made on SD channels that have HD counterparts.
2) Where possible, recreate your auto record series links (ARSL) to use the CCHAN keyword. This keyword (note the two C's) is used to specify a specific channel or channel range where the search (and recordings) will be made. Example:
SEINFELD CCHAN 5
-- The above limits the search to ONLY channel 5
SEINFELD CCHAN 201 299
-- The above limits the search to channels 201 to 299 inclusive
Note: You can't specify multiple sets of channel ranges for a single ARSL. It's either a single channel or a single range.