Because WWE’s RAW crew is going to Australia the first week of August and the SmackDown crew will be in South Africa, they are doing a different tapings schedule for the week before.
RAW will be live on July 22nd from Austin, Texas. The Tuesday, July 23rd event from Laredo, Texas will be the tapings for the July 29th RAW show.
In a rare Wednesday show from Corpus Christi, TX on July 24th, WWE will tape the July 26th SmackDown show. On Thursday, July 25th in Houston, they will tape the August 2nd SmackDown.
(Source: Wrestling Observer Newsletter)