Recordings
The original mixes of these two songs are only available on the Samar 45 released in 1966. The versions on later compilations, titled "Groovemaker", "Groove" and "Two In One Goes" are all radically different. A third Norman song, "Gangster Of Love", often features on compilations but has no involvement by Hendrix, see "Lonnie Youngblood fakes" for more information.

That Little Old Groovemaker
Composer: Jimmy Norman
Recorded at: unknown recording studio, New York City, New York, USA
Producer: Johnny Brantley
Date: 1966
Vocals on Take 1 & Take 2 - Mix 1: Jimmy Norman
Drums: ?
Bass: ?
Piano: ?
Organ on Take 2 - Mix 2: ?
Guitar: Jimi Hendrix
Horns: Lonnie Youngblood

Take 1 [aka Groovemaker]
Mono and stereo versions. This is the most commonly available vocal version.
Available on:
Stereo version - Cd "Before the experience" (Classic Popular CDCD 1172)
Mono version - Lp "For real!" (DJLMD 8011)

Take 2 - Mix 1
Mono version only. Different backing track & vocals compared to Take 1, this version has only been released on the Samar 7".
Available on: 7" You're Only Hurting Yourself / That Little Old Groovemaker (Samar 112)

Take 2 - Mix 2 [aka Groove]
Mono version only. Instrumental mix of Take 2 with the vocals removed and an organ added. This mix has an extra 3 seconds at start that was cut from the vocal Mix 1, but fades out about 13 seconds earlier than Mix 1. This version has been mastered at a different speed than Mix 1 so timings are approximate...
Available on: Lp "Before London" (ACCORD SN-7101) USA 1980

The song was also released by Daniel E. Skidmore III (Brother Soul) on the 7" "Little Old Groovemaker / Listen To The Wind" (Cameo Parkway P-131). Recording director Neil Bogart. Bogart was working for Cameo-Parkway at the time, he later founded Casablanca records and signed Kiss as the first act on the label.

You're Only Hurting Yourself
Composer: Jimmy Norman
Recorded at: unknown recording studio, New York City, New York, USA
Producer: Johnny Brantley
Date: 1966
Vocals on mix 2: Jimmy Norman
Backing vocals on mix 2: The Icemen (Gino Armstrong & James Stokes) ?
Guitar: Jimi Hendrix

Mix 1 [aka Two In One Goes]
Mono and stereo mixes. Instrumental mix of the track with two sax overdubs added, probably the inspiration behind the re-naming of the track.
Available on: Lp "Two great experiences together" (Maple LPM-6004)

Mix 2
Mono mix only, vocal version.
Available on: 7" You're Only Hurting Yourself / That Little Old Groovemaker (Samar 112)