Use the first table and go with 1 lb. for now. That is its weight in the E-Tools program, too. You might want to send an email off to the sage so it can be corrected in a future printing and in the errata.
i always thought table 7-8 was for items when they were empty. for example, a waterskin's weight is 'not worth noting' when empty (table 7-8), but weighs 4 lbs when full (table 7-7). empty flask, not worth noting, acid, alchemist's fire and holy water are 1 1/4 lb (table 7=10)
Table 7-7 on pg. 108 for the belt pouch is its filled weight. (Look at the 1st paragraph under Goods and Services pg. 107) Table 7-8 is the weight of the pouch empty.